Improvement in lamps



L. 1.; .ATWOOD.

'Lamp.

No. 40,226. Patented Oct. 13. 1863.

/ X 5 jmmm,

N, PETERS. numb-ha mer Washington, 01:.

UNITED STATES PATENT OFFICE.

LEWVIS J. ATWOOD, OF WATERBURY, CONNECTICUT.

IMPROVEMENT IN LAMPS.

Specification tbrniing part of Letters Patent No. 40,226, dated October13, 1863.

To all whom it may concern:

Be it known that I, LEWIS J. A'rwoon, of Waterbury, in the county of NewHaven and State ofConnecticut, haveinvented, made, and applied to use acertain new and useful Improvement in Lamps 5 and I do hereby declarethe following to be a full, clear, and exact description of the same,reference being bad to the annexed drawings, makings part of thisspecification, wherein Figure l is a vertical section of my lampburner,and Fig. 2 is a plan of the burner with the chimney turned back.

Similar marks of reference denote the same parts.

Lamps have heretofore been constructed with a diaphragm in the chimney,and burners have also been made with a deflector over the wick to directthe air to the flame, so that the lamp would not require a chimney.

The nature of my said invention consists in a slide supporter for adraft-plate rising above the wick-tube, in combination with a glasschimney having a contracted neck, so that the said draft-plate may beadjusted to the exact point required for producing the best light,reference being bad to the character of oil being used, the exact shapeof the chimney, and the amount of draft required. Thus any slightvariation in the shape of the chimneycan be allowed for by raising orlowering the draftplate, and as this does notobstruct the light, butallows it to shine through the chimney both above and below thedraft-plate, thereis no loss of light by a slight change in the positionot'said draftplate.

In the drawings, (t represents the screw of the burner, taking the neckof any ordinary reservoir. 0 is the wick-tube, c is the ratchetcap, andd is the wick raiser, all as usual. A perforated flange, e, surroundsthe burner to. and forms an airdistributer: fis a ring, hinged at g andprovided with the spring h, to take and retain the flan ge l of thechimney 7c.

2 represents the narrow part or neck of the chimney, and the shape ofthis chimney may be varied as desired; but I prefer that shown. At thenarrow part 2 of the chimney I introduce the draft-plate i, of metal orother material, in the center of which is an opening of the size andshape required for the flame. This draft-plate is to be supported byarms 3 3 from the wick-tube I). The operation of this burner is that thedraftplate 13 and lower part of the chimney direct the draft (passingthrough the distributer 6) upon the flame, and produce aperfectcombustion. At the same time the light is not in the least obstructed,and the cones and deflectors heretofore employed are dispensed with.

In cases where a second or auxiliary draft is required in the chimney,an annular space may be left around the draft-plate i, between that andthe glass chimney, or the edge of said draft-plate may be notched asrepresented. In either case the required amount of air can be admittedto the chimney above this draftplate by the said opening or openings, toperfeet combustion in the upper portions of the flame, which draft isregulated according to the position of said draft-plate, as aforesaid.

I do not claim a chimney titted so as to serve the purpose of adeflector, and at the same time transmit light both above and below theflame; neither do I claim a diaphragm or draft-plate in the chimney, asthese are old but VVha-t I claim, and desire to secure by LettersPatent, is-

The supporter and slide grasping the wicktube and sustaining thedraft-plate, in combination with a glass chimney having a contractedneck, so that the adjustment of the draft-plate can be effected in themanner represented, and for the purposes set forth.

In witness whereof I have hereunto set m y signature this 6th day ofJanuary, 1863.

L. J. ATWCOD.

Witnesses JOSEPH A. BUNNELL, E. D. Graces.

